The effect of restricted irrigation applications on yield and other parameters in II. crop sweet (Sugar) corn plant in Siirt conditions

This study was carried out on the land of Siirt University, Faculty of Agriculture during the growing season of the second crop sugar corn in 2022. The trial was carried out in the trial field conditions with drip irrigation method, in the trial design of parcels divided by random blocks in three iterations. In the trial, 3 sugar corn genotypes; G1 (Late super sweet), G2 (Early super sweet), G3 (Composite sugar) are used. The research consisted of I100, I70 and I35 restricted irrigation applications according to the water content in the soil. The amount of soil water was measured with the A-Pan evaporation vessel. Research; Yield and some yield components were studied. As a result of the research; Yield values ranged from 3232,33 to 4100,66 kgha-1, 1751,11 to 5351,66 kgha-1 and 1633,33 to 6181,66 kgha-1 according to genotype, irrigation issues and interactions, respectively. The blooming times of the crown tassel are respectively; It ranged from 47,22 to 51 days, 44 to 55,66 days and 43 to 58,66 days. Plant height respectively; It ranged from 143,33 to 165,11 cm, 135,33 to 196,66 cm and 125 to 210,33 cm. Initial cob height; It was found to be between 34,38 – 44,11 cm, 21,44 – 59,44 cm and 18,66 – 64 cm. The diameter of the cob is in the genotype; 3,09 – 3,44 cm, in irrigation matters; 2,78 – 3,70 cm. WUE; 0,43 – 0,55 kgda/mm, 0,58 – 0,72 kgda/mm and 0,54 – 0,82 kgda/mm. IWUE values are; 0,46 – 0,59 kgda/mm, 0,68 – 0,76 kgda/mm and 0,64 – 0,89 kgda/mm. Fresh cob yield was calculated as 8108,22 – 9933,44 kgha-1, 5691,55 – 12808,88 kgha-1 and 5303,33 – 13747,66 kgha-1. The leaf area index was found to be 3,12 – 3,72 for genotype and 2,52 – 4,50 for irrigation. In the CWSI value, only the irrigation issue was important and remained between 0,20 and 0,41. Chlorophyll index; 43,26 – 45,95 spad, 40,35 – 48,92 spad and 38,68 – 50,80 spad.